The World: Population - Age 45-49 (2018) - Top 100+
| Rank | Country | Population | Year | |
|---|---|---|---|---|
| 1. | China | 122,972,688 | 2018 | |
| 2. | India | 79,237,696 | 2018 | |
| 3. | United States of America | 20,922,296 | 2018 | |
| 4. | Indonesia | 17,271,834 | 2018 | |
| 5. | Brazil | 14,313,741 | 2018 | |
| 6. | Pakistan | 9,647,132 | 2018 | |
| 7. | Bangladesh | 9,581,419 | 2018 | |
| 8. | Japan | 9,285,163 | 2018 | |
| 9. | Russia | 8,831,728 | 2018 | |
| 10. | Mexico | 7,725,601 | 2018 | |
| 11. | Nigeria | 7,018,484 | 2018 | |
| 12. | Vietnam | 6,268,678 | 2018 | |
| 13. | Germany | 5,749,735 | 2018 | |
| 14. | Philippines | 5,635,285 | 2018 | |
| 15. | Turkey | 5,472,657 | 2018 | |
| 16. | Thailand | 5,122,755 | 2018 | |
| 17. | Iran | 5,095,773 | 2018 | |
| 18. | Italy | 5,095,324 | 2018 | |
| 19. | France | 4,630,864 | 2018 | |
| 20. | United Kingdom | 4,479,936 | 2018 | |
| 21. | Egypt | 4,351,330 | 2018 | |
| 22. | South Korea | 4,217,751 | 2018 | |
| 23. | Spain | 4,141,002 | 2018 | |
| 24. | Myanmar | 3,559,395 | 2018 | |
| 25. | Ethiopia | 3,504,450 | 2018 | |
| 26. | Colombia | 3,088,884 | 2018 | |
| 27. | Ukraine | 2,972,684 | 2018 | |
| 28. | Democratic Republic of the Congo | 2,934,305 | 2018 | |
| 29. | Poland | 2,508,961 | 2018 | |
| 30. | Argentina | 2,505,498 | 2018 | |
| 31. | Algeria | 2,416,902 | 2018 | |
| 32. | Canada | 2,292,357 | 2018 | |
| 33. | Sudan | 2,151,915 | 2018 | |
| 34. | South Africa | 2,116,029 | 2018 | |
| 35. | North Korea | 2,115,092 | 2018 | |
| 36. | Morocco | 2,061,588 | 2018 | |
| 37. | Malaysia | 1,960,048 | 2018 | |
| 38. | Peru | 1,815,624 | 2018 | |
| 39. | Taiwan | 1,775,603 | 2018 | |
| 40. | Romania | 1,764,527 | 2018 | |
| 41. | Venezuela | 1,753,206 | 2018 | |
| 42. | Iraq | 1,747,729 | 2018 | |
| 43. | Kenya | 1,725,430 | 2018 | |
| 44. | Tanzania | 1,701,408 | 2018 | |
| 45. | Uzbekistan | 1,695,850 | 2018 | |
| 46. | Nepal | 1,601,381 | 2018 | |
| 47. | Australia | 1,597,647 | 2018 | |
| 48. | Saudi Arabia | 1,562,899 | 2018 | |
| 49. | Sri Lanka | 1,423,471 | 2018 | |
| 50. | Ghana | 1,337,755 | 2018 | |
| 51. | Afghanistan | 1,251,653 | 2018 | |
| 52. | Netherlands | 1,245,305 | 2018 | |
| 53. | Syria | 1,178,794 | 2018 | |
| 54. | Uganda | 1,126,347 | 2018 | |
| 55. | Kazakhstan | 1,124,590 | 2018 | |
| 56. | Chile | 1,116,551 | 2018 | |
| 57. | Cote d'Ivoire | 1,032,987 | 2018 | |
| 58. | Cuba | 1,005,487 | 2018 | |
| 59. | Madagascar | 980,307 | 2018 | |
| 60. | Ecuador | 897,221 | 2018 | |
| 61. | Yemen | 867,512 | 2018 | |
| 62. | Cambodia | 851,750 | 2018 | |
| 63. | Greece | 844,923 | 2018 | |
| 64. | Cameroon | 832,123 | 2018 | |
| 65. | Mozambique | 830,813 | 2018 | |
| 66. | Portugal | 809,932 | 2018 | |
| 67. | Tunisia | 808,808 | 2018 | |
| 68. | Czech Republic | 752,094 | 2018 | |
| 69. | Angola | 731,428 | 2018 | |
| 70. | Belgium | 728,573 | 2018 | |
| 71. | Burkina Faso | 717,991 | 2018 | |
| 72. | Hungary | 705,534 | 2018 | |
| 73. | Belarus | 644,149 | 2018 | |
| 74. | Azerbaijan | 639,222 | 2018 | |
| 75. | Austria | 632,761 | 2018 | |
| 76. | Dominican Republic | 622,725 | 2018 | |
| 77. | Niger | 618,231 | 2018 | |
| 78. | Sweden | 601,811 | 2018 | |
| 79. | Guatemala | 593,975 | 2018 | |
| 80. | Hong Kong | 571,994 | 2018 | |
| 81. | Switzerland | 569,569 | 2018 | |
| 82. | Malawi | 566,547 | 2018 | |
| 83. | Senegal | 543,716 | 2018 | |
| 84. | Bolivia | 514,248 | 2018 | |
| 85. | Mali | 502,515 | 2018 | |
| 86. | Serbia | 489,527 | 2018 | |
| 87. | Bulgaria | 480,913 | 2018 | |
| 88. | Haiti | 480,117 | 2018 | |
| 89. | Israel | 477,252 | 2018 | |
| 90. | Somalia | 475,102 | 2018 | |
| 91. | Libya | 474,503 | 2018 | |
| 92. | Guinea | 474,454 | 2018 | |
| 93. | Rwanda | 472,622 | 2018 | |
| 94. | Zambia | 467,093 | 2018 | |
| 95. | Tajikistan | 423,696 | 2018 | |
| 96. | Benin | 417,280 | 2018 | |
| 97. | Honduras | 408,999 | 2018 | |
| 98. | Burundi | 406,259 | 2018 | |
| 99. | Paraguay | 403,994 | 2018 | |
| 100. | Singapore | 402,509 | 2018 |
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